
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/**
 * AUTO-GENERATED FILE. DO NOT MODIFY.
 */

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
import { lift } from 'zrender/lib/tool/color.js';
import { extend, isString } from 'zrender/lib/core/util.js';
export default function sunburstVisual(ecModel) {
	var paletteScope = {}; // Default color strategy

	function pickColor(node, seriesModel, treeHeight) {
		// Choose color from palette based on the first level.
		var current = node;

		while (current && current.depth > 1) {
			current = current.parentNode;
		}

		var color = seriesModel.getColorFromPalette(current.name || current.dataIndex + '', paletteScope);

		if (node.depth > 1 && isString(color)) {
			// Lighter on the deeper level.
			color = lift(color, (node.depth - 1) / (treeHeight - 1) * 0.5);
		}

		return color;
	}

	ecModel.eachSeriesByType('sunburst', function (seriesModel) {
		var data = seriesModel.getData();
		var tree = data.tree;
		tree.eachNode(function (node) {
			var model = node.getModel();
			var style = model.getModel('itemStyle').getItemStyle();

			if (!style.fill) {
				style.fill = pickColor(node, seriesModel, tree.root.height);
			}

			var existsStyle = data.ensureUniqueItemVisual(node.dataIndex, 'style');
			extend(existsStyle, style);
		});
	});
}